override fun visitFormalTypeParameter(binaryName: String) {
        typeParameters[binaryName] = ArrayList(1)
        currentTypeParameter = binaryName
    }

    override fun visitClassBound(): SignatureVisitor =
        visitTypeParameterBound()

    override fun visitInterfaceBound(): SignatureVisitor =
        visitTypeParameterBound()

    private
    fun visitTypeParameterBound() =